CNBseven (HK) Electronics Co., Ltd. is based in Guangdong, China. We produce and develop amplifier modules, wireless headphone module, sound exciter, vibration speaker dedicated for building into portable speaker, digital amplifierWe specialize in highly advanced and extremely solutions for the audio manufacturers who serve the international media system, portable touring system, digital amplifier and systems installation market. With strong engineering support and vertically integrated manufacturing facilities, we offers design and manufacturing services for various industries such as professional audio, home entertainment, we also have our assembly factory, also welcome circuit board assembly service.